Radioactive Morganite
Emeralds from the Fazenda Bonfim Region, Rio Grande do Norte, Brazil
In 2006, emeralds were discovered in the Fazenda Bonfim region of northeastern Brazil.
The Identification of Turquoise by Infrared Spectroscopy and X-Ray Powder Diffraction
Identifying Gem-Quality Synthetic Diamonds: An Update
Inamori Synthetic Cat's-Eye Alexandrite
Gem-Quality Grossular-Andradite: A New Garnet from Mali
The Gujar Killi Emerald Deposit, Northwest Frontier Province, Pakistan
Over the last decade, Pakistan has developed into an important source for many gem materials. A number of localities have been identified for emeralds in particular.
A Historic Turquoise Jewelry Set Containing Fossilized Dentine (Odontolite) and Glass
Investigating a set of six antique brooches set with diamonds and light blue cabochons.
Observations on GE-Processed Diamonds: A Photographic Record
Copper-Bearing Tourmalines from New Deposits in Paraíba State, Brazil
Two new deposits of Cu-bearing tourmaline have been found in Paraíba State, Brazil, not far from the original source at Mina da Batalha.
Ruby and Sapphire from the Tan Huong-Truc Lau Area, Yen Bai Province, Northern Vietnam
Primary and secondary deposits in the Tan Huong–Truc Lau area of northern Vietnam’s Yen Bai Province have supplied rubies and some sapphires for more than a decade.
Tsavorite and Other Grossulars from Itrafo, Madagascar
Since 2002, tsavorite and other grossular varieties have been recovered from a primary deposit at Itrafo, a village in the Andrembesoa area of central Madagascar.
Glassy Melt Inclusions in Sapphires from Montana
Two-phase inclusions are investigated in alluvial sapphires from deposits in Montana.
Imitation Rubellite Boulders
Dyed Green Beryl
Mixing of Natural Diamonds with HPHT Synthetic Melee
From Single Source to Global Free Market: The Transformation of the Cultured Pearl Industry
Over the past 15 years a combination of market forces, environmental events, and scientific research has radically changed the cultured pearl industry.
Aquamarine from the Thuong Xuan District, Thanh Hoa Province, Vietnam
Characterization of Colorless Coated Cubic Zirconia (Diamantine)
“Paraíba”-Type Copper-Bearing Tourmaline from Brazil, Nigeria, and Mozambique: Chemical Fingerprinting By LA-ICP-MS
Gem-quality bright blue to green “Paraíba”-type Cu-bearing tourmaline is now known from deposits in Africa (Nigeria and Mozambique), in addition to three commercial localities in Brazil (in Paraíba and Rio Grande do Norte States).
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